Chinese projector market already entered high speed to develop drive. Came in April 2007 June, chinese electron chamber of commerce combines MII electron the 4th institute, consult " electronic projector measurement technique " , unripe to general of the Suo Ni on Chinese market, love, associate, Toshiba, day stands, beautiful can, 17 brands such as long rainbow, product of projector of nearly 40 mainstreams undertook open, fairness try to find out the real intention test. On the whole, eliminate definition quota beyond, other each index all is put in particular problem. This " function of product of Chinese market projector is evaluated " aim to promote market health to develop, normative and clear, unified product marks, also be the collection of parameter of pair of data of mainstream projector product next.