Size & quality
Digital signage is made up of different components so there is an almost endless number of variations of what can be used, and how. However, there are five key different types that you are most likely to encounter.
Small format relates to screen sizes of less than 20 inches*. This is only for use by a single person at a time. It is used in situations like car showrooms, to display a meeting room’s occupancy status, or at the side of an escalator/lift.
Large format refers to screens ranging from 20-100 inches*. These tend to be located in areas of high footfall such as retail stores, shopping centres, cinemas to enable around 10 to 30 people to view the same content simultaneously.
These are high definition displays (as opposed to LCD screens which offers standard definition) and are generally above 85 inches*. They are clearer from a distance or close up, and are used for high impact. Whilst they can be more expensive then LCD screens to purchase, they are easier to maintain and tend to be more cost-effective over time.
Video Wall/LED Wall
A video wall is a series of at least four small screens (each is usually 1m x 1m) that are positioned together like tiles, and syncronised so they form a larger display, and act together as a single screen. For this reason, video walls can be almost any size or design, but they tend to start in size from 2m x 2m.
They are the cheapest way of creating a large display and offer lots of flexibility, however, if one screen within the display fails, it renders the whole video wall unusable.
Another similar type of large display, similar to a video wall, is an LED wall. These are a series of tiles or panels containing LEDs which are slotted together to create a seamless display with no bezels. They are more vibrant and give higher definition, making it easier to see on-screen content more clearly when close up or further away. They are more energy efficient and easier to maintain, but are subsequently more expensive to purchase.
High bright screens can be up to eight times brighter than a standard large format screen and are used for window displays and outdoor signage to counteract the glare of the sun on the screen which can make it harder to see on-screen content.
The brightness of the screen is measured in candela, which refers to the luminous intensity emitted by a point light source in a particular direction – a single unit is roughly the equivalent of the light that a single candle would produce. They tend to range in brightness from 1000 cd/m² to 3000 cd/m², but they can be as low as 700 cd/m² or as high as 7000 cd/m².