"The individual is umbriferous times " forthcoming, are you ready? The projector that future can carry is deft and portable, on the life, the hope when travel can be put in in the bag, when the party is arisen, those who put popular feeling of a shock is big or on musical setting job. Ad firm often carries projector to come to do draft resolution to demonstrate, the teacher carries projector to arrive from the office at any time classroom, besides facilitate carry, prospective projector still can get used to all sorts of umbriferous environments, satisfy the need that has showing at any time and place. Nevertheless, to those customer that know projector not quite, the projector that chooses appropriate brightness is a difficult problem. Someone says brightness jumps over tall projector to had been jumped over, umbriferous the picture that give is met character outstanding. Actually this is an error.

　　 Has been brightness jumped over higher?

The factor with the screen the mainest picture that we notice is brightness. Outside the double eye that draws us besides the brightness of whole picture, our eye still can is opposite the consistency of picture brightness, uniformity undertakes discriminating. Project when image when going up to screen, the brightness of place of the any on the picture is consistent, it is a when must consider main factor. When the user needs how old umbriferous area certainly, the salesperson that has experience can put forward the umbriferous indication brightness that suit immediately, at this moment his commendation index is the brightness index that can make the picture agrees equably commonly.

The brightness of projector has the unit such as lumen, LUX, FOOT. In inchoate projector industry, CRT projector is worth projector of lumen, LCD to indicate with LUX with 10 ％ Bai Feng brightness, unscientific sex mixes these index existence huge cannot compare a gender. Because standard of camp of country of this United States learns (ANSI) the test standard that made solid treasure in the light of the brightness of projector, below the case that decided frequency of resolution thing, colour temperature, field and contrast, measure brightness from nine area, gotten average is ANSI lumen. It is scientific that this kind measures way, it reacted objectively the brightness of projector, the brightness index of projector is unified already now for ANSI lumen.

Appropriate brightness, depend on umbriferous and how old picture and environmental light. To same projector, the picture is bigger, brightness is lower, jump over bright; to see too dark picture eye can take pain to conversely, too bright picture produces visual exhaustion easily. Generally speaking, the projector with taller brightness, picture effect will be opposite betterer. Dan Liang spends the only factor that is not decision picture quality absolutely, and long (grow to be in 2 hours or so when a film) the picture that watchs exorbitant brightness, may bring about dazzling, make audience eyestrain, watch for a long time bring about an eye even red, weep the generation that waits for a phenomenon, damage eyesight badly. So, pure pursuit tall brightness cannot be taken.
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