Infrared Touch Screen Examples

Overview of infrared touchscreen technology.

Infrared touch screen examples.

The touch screen monitor didn t have a touch screen in the strict sense. While it had a 9 inch sony cathode ray tube crt encircled by infrared transmitters and receivers which are controlled by the position of any non transparent objects on the screen. A simple infrared touch system is composed of multiple infrared emitters led or lasers and infrared receivers. An infrared touch screen is a screen with which one interacts by touching the screen s surface rather than by using an input object such as a mouse and it operates with ir light.

With an ir touch screen there are many different ir light emitting diodes leds. This creates an invisible grid of infrared beams and on the opposite side of the display from the emitters photodetectors or sensors identify touch when the. Ir touchscreen devices support touch based input just like any other touchscreen device. While there s no sign of either resistive or capacitive touchscreen technology fading anytime soon companies are also exploring new solutions including infrared.

A touchscreen or touch screen is both an input and output device and normally layered on the top of an electronic visual display of an information processing system the display is often an lcd or oled display while the system is usually a laptop tablet or smartphone a user can give input or control the information processing system through simple or multi touch gestures by touching the. While these are the two most popular types of touch sensing technology there are others available including infrared ir. When an object interrupts the invisible infrared light. Instead infrared monitors use ir emitters and receivers to create an invisible grid of light beams across the screen.

Infrared touch screens operate by calculating light beam interruption or beam break to determine the location of touch events. The former relies on pressure to identify touch whereas the latter measures changes in capacitance to identify touch. The purpose of the emitters is to emit infrared light to the receivers a virtual grid system or similar formed by the emitters and receivers. When a finger or object changes the light pattern the screen picks up the touch.

This is a perimeter based touch technology differing from surface acoustic wave in that infrared light beams are used and not ultrasonic waves. Infrared touch screen monitors do not overlay the display with an additional screen or screen sandwich. So what is an ir touchscreen exactly and how does it work. Infrared touch uses light emitting diodes and sensors that are embedded in a bezel around the display and emit and detect rows and columns of infrared light across the face of the display.