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Fax 512-846-2425
Scanning Infa Red (IR)
IR uses a Printed Circuit Board (PCB) "frame" around the perimeter of the display. On two sides there are closely spaced IR LEDs and on the opposing two sides there are matching photo transistors. The LEDs are turned on in sequence and the signal is read from the matching transistor. If no signal is read, then that indicates a blocked IR beam, meaning a touch. No actual touch "screen" is required for operation, however a plate of glass is generally used to protect the underlying display from damage and to provide anti-glare.
| Advantages | Disadvantages |
| Highest quality of underlying image | Surface obstructions can cause a false touch |
| Very high transmittance (no conductive layers, only glass between image) |
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| Excellent anti-glare, with use of chemically etched glass |
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| Can be activated with almost any device | |
| Higher accuracy than other technologies | |
| Very high durability and reliability | |
| One-time factory calibration | |
| Can be sealed | |
| No-wear mechanism |
Infrared technology is most suitable for the following environments:
- Indoor/outdoor kiosks
- ATMs
- Ticketing machines
- Medical instrumentation
- Process control systems
- Hospital operating room
- Commercial transportation
- Commercial food preparation and service
- Large plasma displays