SAFE ZONE LCD displays can be used for outdoor digital signage applications, however, it is important that the display is specifi cally designed to handle extreme weather, direct sunlight and solar load. Not having the right solution for the application can lead to equipment failure. Oft entimes, special separate enclosures that add shatter-proof protective glass or additional heating and cooling are necessary to house the displays and protect them from the environment. LEDs are light-emitting diodes, meaning they emit colors and are not refl ective the way an LCD is. Even though they do not refl ect light the same way an LCD does, it’s still important to consider the refl ectivity of an LED panel’s surface, and the two factors that aff ect it. Th e fi rst is resin placed over the LED itself. Most quality LED displays developed for indoor applications will use a small LED package that houses the red, blue and green LEDs in a single packet, which is covered with a resin to protect the LEDs. Th e face of these packetized LEDs can either be white or varying shades of gray, and the darker the face, the less light it will typically refl ect. Th e second factor is the refl ective properties of the mask or area between the LEDs, which is typically made from black plastic with a matte surface. One good way to tell if the mask has adequate antirefl ective properties is to view the display from the side. If the display turns into a mirror, it may not have adequate antirefl ective properties. LED displays work well for any kind of distance viewing, including advertising, or if content warrants a large, seamless display. LED displays can be produced 28 | Mass Transit | MassTransitmag.com | MARCH 2017 www.uitpsummit.org In collaboration with Supporting organisations Local hosts Register Now! For more information, visit www.MassTransitmag.com/10066309 with fi ne pixel pitches to give the displays high clarity and picture quality up close. Th ey can also be produced with a wider pixel pitch and very bright intensity, allowing viewing at great distances, even in outdoor spaces. Th is means that transit agencies have greater fl exibility with the type of content they choose to display (including font type and size), as well as where the displays are placed – travelers will be able to read them whether they are close or far away. If users are looking for the same quality and resolution as LCD, the LED display needs to be bigger and placed farther away from viewers; however, costs per inch and cost per pixel skew higher with LED. It’s important to work with an integrator to ensure that a transit agency is not “wasting” pixels by purchasing displays with Digital signage is easily updated, making it simple to instantly swap out content by uploading it to a server, whereas a static sign can only be updated if an employee physically changes out the sign.
MassTransit_March_2017
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