Determining the right brightness for your application is extremely important. Having a screen that is not bright enough, or too bright, can render your installation useless and ineffective.
Here are a few things to consider when designing your LED wall:
- Indoor Brightness: 1000-1500 nits is enough for most indoor use
- Outdoor Brightness at close viewing: 2000-3000 nits is usually enough for most situations
- Outdoor Brightness with direct sun: up to 5,000 + nits should be enough in most situations
Pixel pitch is the physical distance measured in millimeters from the center of one pixel to its closest neighboring pixel. The higher the number, the less pixels and the lower the resolution; the smaller the number, the more pixels and higher the resolution. Let’s take one more step. Resolution is the number of pixels contained in the physical area of your LED display. The more pixels you have per square meter, the more detail your wall will display. Overall resolution is determined by display size, pixel technology, pixel pitch and viewing distance.
Here is an example showing resolution in 5mm steps from left to right, with the lowest resolution on the right.
Resolution vs Viewing Distance
Understanding how viewing distance and resolution correlate can not only help you better pair yourself with the right product but also save you a ton of money. Viewing distances are somewhat subjective, but can roughly be calculated based on the display type and the distance from the display. Each display will have a recommended minimum viewing distance that may vary based on application and your intended use.
The general rule is 3.28 feet per 1mm of resolution. Several factors can affect this practice such as screen size and viewing distance, but the chart above illustrates the accepted practice for the LED video display industry.
One aspect people seem to really worry about is text size on an LED display. Text is often misdesigned and can render your use ineffective if you are not careful. This can mostly be explained along with the following principle: The larger the character, the longer the viewing distance, while a small character will have a shorter viewing distance. The more pixel space and resolution you have, the better your content will appear.