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4- and 5-Wire Resistive Touch Screens from The Bergquist Company
Now Available at Digi-Key
In stock, these products can be purchased on Digi-Key's global websites. Bergquist touch screens are also featured in Digi-Key's print and online catalogs.
Bergquist optimized 4-wire resistive technology solutions are rated for 10 million single point activations and feature enhanced coatings to increase brightness and reduce reflections. Benefits include high resolution, pressure sensitive activation (with stylus and gloved finger), resistance to dirt and water, low cost, and low power consumption. Applications include handheld devices, light industrial, and home appliances.
Bergquist 5-wire resistive analog touch screens are ideally suited for durable, reliable performance in a wide variety of demanding physical and harsh-environment applications. Unlike other resistive technologies that must use opposing layers to create X and Y-axis measurements, the Bergquist 5-wire utilizes the stable substrate of glass for both X and Y-axis measurements.
Electrically, the 5-wire operates by supplying five volts to ground and toggling in both directions, thus supplying the X and Y-axis measurements. The sense line, or fifth wire, is connected to the top film substrate. When the top layer is depressed, making contact with the base layer, it picks up the voltage data and carries it to the electronics. Because the top layer is acting only as pick-up layer, it can tolerate resistive changes without impacting the reliability of the touch points' accuracy from the base layer. For this reason, the 5-wire is able to withstand temperature, humidity, and mechanical stresses, and as a result, 5-wire touch screens are specified for 35 million activations. Other benefits include its high resistance to scratches, abrasions, and external contaminants as well as its superior image clarity and brightness.
"We are very pleased to offer these quality touch screen products to the tens of thousands of design engineers who rely on Digi-Key to have the products they need when they need them," said Digi-Key President and COO Mark Larson.
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