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3 Common Problems When Integrating A Touch Screen


The process for integrating a touch screen into an enclosure consists of a number of intricate steps and techniques that, if mishandled, can lead to serious problems. At Phoenix Mecano, our years of experience with the integration process have given us insight into 3 common problems that can occur when touchscreens are not properly integrated with an enclosure.

“Dirt Collecting” Areas

The simplest way to install a touch screen in an enclosure is to provide a cut out and fix the touch screen to the inside of the enclosure. Enclosures with front cutouts and corners where dust can accumulate are not appropriate in industries like foodstuffs and medical technology. This method also provides minimum protection for the touch screen and limited sealing of the enclosure from dust and moisture. Our team can use one of two solutions, depending on which type of touch screen is being used. For resistive touch screens, a continuous front membrane is used to create a single surface, while capacitive touch screens are bonded to cover glass.

Unintended Optical Effects

Air bubbles. Newton rings. Reduced visibility. If you’ve seen it on a touch screen it probably means that the display was not installed properly. As with the above problems, our team uses proven techniques to negate and eliminate these issues. For resistive touch applications a flexible custom membrane is created with airgaps and spacer dots to prevent Newton rings. For capacitive screen our team bonds a cover glass to the touch screen with an optically clear adhesive. This ensures high-quality visibility, eliminates air bubbles and reduces glare.

Improperly Securing the Components in the Enclosure

Fixing the touch screen to the enclosure is only the first part of reliable touch integration. The internal components need to be mounted securely, taking into account the physical dimensions and tolerances of each component. Consideration should be taken for mounting and wiring connections to the PCB within the enclosure. A complete solution should be mindful of the environmental conditions including mechanical loads and thermal expansion. To respond to these challenges our team develops a project specific retaining plates. The retaining plate system provides support for the touch screen, ensures proper fit of the components and safeguards the internal components from shock or vibration.

The best projects are the ones you never worry about

At Phoenix Mecano, we have the tools and technology to take your touch integration project from commission to completion, without any complications. Visit www.phoenixmecano.com to see a full listing of our products and services, and to get your project started.