Infrared Optical

Linear Correlating Touch Technology

Infrared Optical

A D Metro’s patented linear correlating infrared (LCIR) touch technology delivers highly responsive, precise, glove-compatible, two-touch, zero-force operation. Perfect display clarity is preserved because the sensor does not cover the display. Unlike other infrared touch sensors, LCIR is fully reliable – immune even to the sun’s full intensity from any direction.

Traditional infrared touch systems include rectangular sensor frames, LEDs and photodetectors, optionally enclosed by a bezel or cover. These touch sensors have the inherent advantages of perfect light transmission, negligible radio emissions, unrestricted glove compatibility, high tolerance of radio interference, zero-force touch operation, and compatibility with extreme temperatures and pressures.

The A D Metro compact LCIR design improves over traditional infrared touch systems in several ways. Linear correlation techniques are used to communicate optical signals across the sensor surface. This achives exceptional reliability and touch precision finer than the pitch of optical devices in the frame. The LCIR design also delivers two-touch performance by using optical scans at angles across the touch sensing area – excellent for applications requiring pinch, zoom, and rotate operations.

LCIR touch systems consist of a sensor frame and controller board. Options for interfacing the controller board to your system include USB (which interfaces with many operating systems without the need for a driver), RS-232 (low voltage) or I2C.

Choose an A D Metro LCIR touch system for applications that are difficult to serve with PCAP technology, perhaps due to radio emission or susceptibility challenges or severe design constraints involving display visibility or glove compatibility.

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Product Features

A D Metro’s innovative LCIR solution is an excellent choice for applications that require multi-touch features but have difficulty integrating projected capacitive (PCAP) touch sensors. Even when exposed to challenging environments such as strong radio frequency interference (RFI) and full sunlight interference, LCIR technology offers:

  1. 100% optical clarity/maximum contrast due to the absence of substrate layer
  2. Reliable two-touch functionality
  3. Gloved fingers and 5mm stylus touch input compatibility
  4. 100% sunlight immunity including strobing sunlight.
IR Infrared Touch Screens

Explore Other Touch Screen Technologies

Projected Capacitive (PCAP) touch screens offer the user friendly multi-touch experience, associated with smartphones and tablets, operating with very light touch through a highly durable glass surface.
A D Metro’s resistive touch products include two styles of sensors. Choose either our conventional, standard resistive sensors or our patented ULTRA armored resistive sensors. ULTRA sensors are proven in the most physically demanding touch applications.
A D Metro offers a complete line of Surface Acoustic Wave (SAW) touch screens kits, consisting of touch screen and controller. SAW offers an excellent alternative for many touch applications requiring a light touch, excellent optical characteristics and a very durable surface.

Ask the touch screen experts at A D Metro