Resistive Technology Touchscreens

3M Touch Systems (formerly MicroTouch)

3M Touch System's MicroTouch Resistive Technology Touchscreens
System designers, OEMs, and resellers have turned increasingly to resistive touchscreens for intuitive interfaces in applications including point-of-sale, process control, medical instrumentation, and personal information management systems. MicroTouch Systems provides resistive touchscreens which meet the toughest requirements in these and other markets: 4-wire resistive touchscreens of unsurpassed optical quality, the industry's most durable 5-wire touchscreens, and digital matrix touchscreens well suited for hybrid applications, where replacement of traditional membrane switches and mechanical buttons is desirable.
The MicroTouch Systems' family of resistive touchscreens offers three types of resistive technology: 4-wire analog, 5-wire analog, and digital matrix. TouchTek4, TouchTek5, and TouchTekDM touchscreens are available in standard sizes and custom configurations to meet a wide range of specifications. Whether you're designing a simple membrane switch replacement for an industrial application, looking for a touch interface with superior optics, mouse emulation and low power requirements for consumer electronics, or need a highly durable, optically superior touchscreen monitor for a point-of-sale system, MicroTouch has the best touchscreen solution.

Resistive technology uses input from a finger, pen, or other stylus to compress a conductively-coated polyester topsheet into a conductively-coated glass layer, completing a circuit. The touchscreen's electronics pinpoint the location of the touch and relay the information to the controller and, thus, to the application. MicroTouch offers a wide range of controllers and software for its touchscreens.

TouchTek resistive touchscreens combine input flexibility with superior optical quality and durability. Optics are of critical importance in industrial applications where pull-down menus must be easy to read and access. Personal computing devices, which use low-light backlighting, require clear, precise touchscreens. And high-priced LCD monitors, not backlit as are CRT monitors, rely upon quality optics for viewing clarity.

Durability is another key consideration when selecting a touchscreen. Many touchscreen implementations require uninterrupted operation and minimal downtime. TouchTek resistive touchscreens feature a durable polyester topsheet finished with a tough, scratch-resistant hardcoat. The topsheet resists abrasions and chemicals, and is available in a variety of surface finishes to maximize light transmission, control reflected glare, and ensure screen clarity. TouchTek's durability is unmatched.

MicroTouch Systems supports its products and customers with a world-wide sales and service organization trained to provide custom engineering, technical support, and rapid prototyping.

How TouchTek Technology Works

Conductive coatings on faces of polyester topsheet and glass bottom sensor separated by tiny spacer dots.

Current applied to topsheet.

Touch compresses topsheet to contact bottom.

Controller simultaneously reads proportional current flow to four corners and calculates position of finger.

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