Before you buy LED screen
· estimate the size and location of your LED screens;
· work out the minimum viewing distances;
· how many and what type of sources will you use;
· will the LED screen be permanent or will it need to move.
Determining these factors beforehand will allow a LED screen manufacturer/supplier to estimate the pixel pitch and nature of the LED screen you may need. When you budget for any screen, and especially an LED screen, you should be aware that without consideration for the content, the final effect will be poor. It is a better idea to determine the content first and use a sample of the content in the format you plan to demo your LED screen. In particular, scenes with a lot of motion and camera pans will create certain LED screen processor problems. Look for objectionable noise artifacts in large expanses of a single color (especially black or very dark areas).
Always remember, the LED screen manufacturer's demo is designed to emphasize the best points about the LED screen, and it is up to you to make them prove how good it really is. Test patterns, for color, grayscale and motion are essential. Take these with you to a demo, in the format you will use with your final LED screen. When you have the final 2 or 3 companies defined, you should give serious consideration to a “shoot out”, with competing LED screens set up side by side- fed from the same source video. While this can be expensive, it is the only way to truly compare the competitor's products.