How Does a Film Projector Present the Shade Black?

Courtesy of Rhett Allain

However what in regards to the colours from a video projector? It primarily does the identical factor. Nevertheless, as an alternative of a bunch of tiny RGB lights, it tasks RGB colours to completely different areas on the display screen.

Projecting the Shade Black

Now we’re prepared for the enjoyable stuff. How does a video projector shoot out black gentle? Black gentle can be the absence of any gentle, as we noticed earlier than. How do you challenge nothing? First, let’s think about a display screen like a TV. In case you have three tiny lights (purple, inexperienced, blue), you can also make a tiny black dot by simply turning off the lights for all three colours in that spot. Growth, it’s black!

So, is it doable that you just simply flip off the projector to make black? That may’t be proper, can it? If that was the case, you could not inform the distinction between a projected black coloration and the display screen with out the projector even on. Sure, that’s precisely the way it works.

Test it out: Within the following picture, I am projecting a slide that’s half black and half white. The slide takes up many of the display screen.