Wincor Nixdorf BA82 User Manual Page 16

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BA82 User Manual
9
Infrared Touch Screen
General
The infrared (IR) technology is based on the interruption of a grid of IR light
beams before the surface of a screen. The touch frame contains a row of
infrared light emitting diodes (LEDs) and photo transistors, each mounted
on two opposite sides to create a grid of invisible infrared light.
How To Operate
1
Touch Activation
2
Receiver
3 Active Display Area
4
Transmitter
IR light beams are produced and transmitted over the surface of the
screen. The photo sensors accept the beams. When an object
(min. 8mm Ø), such as a finger, enters the hidden grid, it obstructs the
beams. One or more photo sensors detect the absence of light and trans-
mit a signal, that identifies the x and y coordinates.
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