1. LED, LCD yog dab tsi? LED stands rau lub teeb-Emitting Diode, ib tug semiconductor ntaus ntawv ua los ntawm cov tebchaw muaj xws li Gallium (Ga), Arsenic (As), Phosphorus (P), thiab Nitrogen (N). Thaum cov electrons recombine nrog lub qhov, lawv emit pom lub teeb, ua LEDs zoo heev ntawm converting ele ...
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