touch screen

Components of a Touch Screen

A touch screen typically has the following basic components:

        Touch sensor – A touch-responsive surface, typically a glass panel that is placed over a visual display monitor. The technologies vary slightly, but typically, the sensor registers change in electrical signal distortion to sense a touch event and location.

         Controller – An electronic device (PCB) is the interface between the sensor and the display.  The controller takes information from the touch screen and translates it into information a computer can understand.

         Software driver – A computer program that enables the computer operating system and the controller to communicate.

Types of Touch Screens 

 To achieve the desired human to machine interface, there are a number of different touch screen technologies available. We offer a variety of touch screen technologies, including:

Resistive Touch Screens(4-Wire & 5-Wire)

The Resistive Touch Screen is the preferred solution for low-cost applications. It consists of a conductive bottom layer of either glass or film and a conductive top film layer, separated by transparent spacer dots.  A voltage is applied to the conductive surface. When pressure is applied to the top layer, it is deflected and makes contact with the bottom layer resulting in a voltage change. This change is detected by the controller.

This technology is functional and economical for industries and applications such as food service, industrial controls, point-of-sale (POS), and handheld devices.

Resistive Touch Screen Features:

       Activation by finger, glove, or stylus

       High touch point resolution

       Low power requirements