Because projector market basically consumes a group to be in business affairs and educational field, belong to a large amount of limits that purchase commonly, often be superintendency place negligence consequently. But notable is, although the ceaseless progress of projector technology expands ceaselessly with what use a field, projector has been being permeated towards recreational industry and family, predict market demand will achieve 655 thousand 2007.

And after consumer is patulous, for the cogent interest that protects consumer, the potential user that enlarges whole industry on a more transparent foundation group, each index of concerned projector function also must be combed stage by stage, standard, facilitating consumer understands and accept.

Show level, concerned projector product is measured 3 kinds of standards consult: AStandard of association of level of state of NSI(United States) , ISO(with Japanese office machine and association of information system industry (the international projector standard that JBMIA) is a foundation about method of projector performance measurement) and " electronic projector measurement technique " (" SJ/T 11346-2006 of occupation standard of electron of People's Republic of China " ) , among them " electronic projector measurement technique " it is MII is inOn March 29, 2006Promulgate carry out, belong to a kind to recommend the standard with sexual mandatory and rather than. In use, a lot of enterprises do not carry out recommended national level, the standard of use enterprise oneself, the tagging of end item index is extremely consequently skimble-scamble, inconvenience undertakes comparative at consumer. More serious problem is, partial enterprise the appeal to add a product, the performance data of product of mark of empty mark excessive, disturbed badly projector market environment.

This year 4 to in 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, sort of LCD, DLP, LCOS3, 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 puts in the problem:

Although major company light outputs index to detect value and nominal cost gap is in basically 20% less than, accord with standard regulation, but light of product of a few company is outputted under nominal value 50% .

Projector product contrast detects value and enterprise are nominal very big difference exists between the value. Enterprise of LCD projector contrast is nominal the value is in commonly 400:1~600:1Between, detect actually the value is in only commonly 100:1~300:1Between, among them 63.6% but the 150:1 that up to mark asksAbove; DLP projector contrast is nominal 2000:1~2500:1, detect actually the value is in commonly 100:1~500:1Between, among them 88.9% can requirement of up to mark.
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