no. screen of green is when you position a screen above the plant and have the plant grow up to it. As the plant tries to grow through the screen you tuck the plants arms back under the screen and to the side. this will make the plant grow horizontal wrather than verticle.
compare it to this
"what gets more sunlight? a pole or a wall?
your plant wants to grow like a pole but now the "SCROG" makes it grow like a wall