What Screens Are Used for Digital Signage?

Digital signage screens are mostly commercial LCD displays: panels built to run for long hours, often around the clock, with a published panel life, portrait mounting support and remote control over the network or RS-232. They look like televisions, but they are designed for a different job.

Beyond the standard commercial display, the choice depends on where the screen goes and what it has to do. A shop window needs a much brighter panel than a lobby. A self-service kiosk needs touch. A sign above a supermarket shelf or a train door needs an unusual shape. A screen the size of a building wall is usually made from direct-view LED modules rather than one LCD.

Whatever the screen, it still needs a media player to store and play the content, either built into the display or as a separate box, and content management software to schedule it.

The table compares the main screen types used for signage. Brightness and sizes are typical ranges, so check the datasheet for each model.

OLED and transparent OLED panels are also used for high-end retail windows and showrooms, and projection still suits very large temporary images, but both are niche next to LCD and LED.

A consumer TV is tuned to be watched for a few hours a day in a living room. A commercial display is built to be left running and managed remotely. The panel and electronics may come from the same factories, but the specification differs in ways that matter once a screen is on all day.

Brightness is the specification that decides whether a sign can be read. Screen brightness is measured in nits (candelas per square metre). Indoors, around 350 to 700 nits is usually enough. A screen facing a shop window competes with daylight and typically needs 700 to 2,500 nits. In direct sun, 1,500 nits is a sensible minimum, and many outdoor screens are 2,500 nits or more with an ambient light sensor that dims them at night.

Brightness is only half the answer. Reflections from the front glass wash out the picture, so outdoor screens use anti-reflective coatings or optical bonding as well. Our sunlight-readable monitors run from 1,000 to 2,500 nits in sizes up to 55″, and our guide to choosing a sunlight-readable display covers coatings, bonding and heat in more detail.

Interactive signage needs a touch layer. Projected capacitive (PCAP) touch behind glass is the usual choice up to around 55″ because it supports multi-touch and works through a toughened front. Larger screens often use an infrared touch frame instead. Our touchscreen monitors run from small panels up to 55″ for kiosks, wayfinding and ordering points.

Some signage jobs need a shape a standard display cannot provide. Stretched displays cut a panel to a long, narrow ratio for shelf edges and the space above train doors. Open frame monitors have no outer housing, so a kiosk builder can mount the panel directly behind their own front glass.

We configure and test industrial, touchscreen and sunlight-readable displays as standard, and pair each one with a player and mounting chosen for the site.