投影机 and
投影仪 are interchangeable —
投影机 leans toward office/classroom devices,
投影仪 toward consumer/home cinema, but most people use them as synonyms. Major Chinese home brands:
极米 (XGIMI),
当贝,
坚果. Compare
短焦投影 (short-throw) and
激光电视 (laser TV — basically a UST projector with a screen).
