The answer to this question lies in what LED technology has over Digital Light Processing. Depending on how they are used, both are effective. But as far as visual presentations go, an LED sign, has, without question, a lot over a DLT screen.
Up to now there are still establishments that use projector screens in their everyday operation. In some schools, churches, and offices you will still see DLT screens. Now these things are okay because they get the job done. But are they as efficient as LED screens?
One look at your ordinary LED screen and you will readily see the difference. They simply provide better visuals, you only need half an eye to judge. As opposed to projectors, you need not turn off the lights for LED screens to be effective. Turn the lights on and a projector screen is practically worthless. If surprisingly that doesn’t convince you, let’s put the lights (pun intended) on two very important things: Ease of use and maintenance.
Ease of use
A projector requires at least 5 minutes of warm-up time. A less efficient version would need more than 10 minutes. Just the same, closing it calls for a few minutes, whereas an LED screen requires virtually no time.
In terms of maintenance, an LED screen outpoints the projector screen by a huge margin. The latter is just much harder to repair and naturally pricier. Changing lamps is not a problem for LED screens for the reason that, well, they don’t utilize lamps. Depending on how often they are used, a projector screen needs to change lamps every few months. To be perfectly straight, LED screens last longer than projector screens.
Really, with the quality of visuals alone, do you really need any other reason why LED is so much better?