Winmate R15IV3S-MR series, User Manual

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User Manual Marine Bridge Panel PC System 11
1.3.2 Secure Touch Surface Wave Touch screen (Optional 2)
Introduction to SAW Touch screen
The surface wave is the optical standard of touch. Its pure glass construction provides superior
optical performance and makes it the most scratch-resistant technology available. It's nearly
impossible to physically "wear out" this touchscreen.
The touch have a glass overlay with transmitting and receiving piezoelectric transducers for
both the X and Y axes. The touchscreen controller sends a five-megahertz electrical signal to
the transmitting transducer, which converts the signal into ultrasonic waves within the glass.
These waves are directed across the front surface of the touchscreen by an array of reflectors.
Reflectors on the opposite side gather and direct the waves to the receiving transducer, which
reconverts them into an electrical signal
—a digital map of the touchscreen surface.
When you touch the screen, you absorb a portion of the wave traveling across it. The received
signal is then compared to the stored digital map, the change recognized, and a coordinate
calculated. This process happens independently for both the X and Y axes. By measuring the
amount of the signal that is absorbed, a Z-axis is also determined. The digitized coordinates
are transmitted to the computer for processing.
Brief Specifications
Subject Details
Input Method Finger or gloved hand (cloth, leather, or rubber) activation
Positional Accuracy Standard deviation of error is less than 0.080 in. (2 mm)
Resolution Touch point density is based on controller resolution of 4096 x
4096, plus 255 levels corresponding to touch pressure
Touch Activation Force Typically 2 to 3 ounces (55 to 85 grams)
Light Transmission Up to 90% per ASTM D1003-92
Update touch-screen driver or new information. Go to www.elotouch.com