بخصوص البلازما
Plasma HDTVs don’t rely on a light bulb shining through or reflecting off of something (as an LCD or DLP system does). Plasma brightness is even better than CRT’s in some ways because the picture is evenly bright across the entire screen.
بخصوص lcd
LCD is a transmissive system – light is shined through the liquid crystals. Some of that light gets absorbed or reflected back away from the viewer. This means that LCD displays are not as bright as CRT, plasma, and even some projection TVs – this could be a factor in a brightly lit room
See: LCD vs Plasma
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