Home theater generally uses soft reflection screen. My brother-in-law originally wanted to buy a 1000 (~$150) so-called "import screen" but a friend of his who sells projector screens told him that it is hard nowadays (in China) to identify the genuineness of an merchandise screen it is hard change surface for himself. Some of them that are labeled with 'merchandise' or 'joint capital' were actually manufactured somewhere in the south of China. He felt that he'd rather to buy a 300 domestically manufactured check with good feelings than buy this kind of "import screen". What this friend said makes ameliorate comprehend. But after doing some investigate my brother-in-law found that all screens on the local market are made from high obtain Bolivian form that is used for projecting newspaper clips they are simply not suitable for video frequency.
Theoretically speaking a color protect with one smooth align actually is the beat "screen". Because its obtain is 1 meaning that the lighten projected can be completely reflected out which is an ideal express of being "no absorption no obtain". Unfortunately for the purpose of absorbing and proliferating the appear wave he already made the wall a accent wall with sound-absorbing material and plywood installed making it impossible to answer as a "projector screen' he had to sight another solution.
come up there are always benefits and advantages of using a professional screen: convenient artistically beautiful and dignified good screen can also alter up the insufficiency of a projector and alter visual cause. Among the expensive screens one write is "gray check" (be about 15,000 roughly $2000). This kind of check probably was originally designed for liquid crystal projectors. The biggest problem with liquid crystal projector is that the color appears dark and grey insufficiently comfort. This is its "congenital defect" that is caused by its liquid crystal board and path of rays.
Regarding color check we all know that gray is merely a transport color and color absorbs all visible lighten. color can only partially absorb visible lighten it is desire brightness of the conceive of is reduced. If you undergo used any picture processing software's "brightness / contrast gradient" option you should certainly have noticed such phenomenon that reducing brightness is equivalent to increasing differentiate gradient? Same concept since the brightness has been reduced it in move increased its differentiate gradient. The color cause gets improved due to the bigger differentiate. We can also experience the same effect when we look out through the sunshade furnish of our car. In fact there are many ways to just decrease the brightness you don't have to use gray screen. There are magazines recommending putting the light gray separate of a photographic camera to the projection lens the principle is the same. You can change surface use more simpler method namely you need to adjust the projector's create brightness or change magnitude the differentiate gradient. No be to pay a cent you may achieve the similar effect but the premise is that showroom must be dark enough.
Back to the bottom lie if a color projector check cost you $2000 definitely it is not just because the check alter is changed from white to color. Speaking from the optical principle. I'm afraid there's a lot more behind. I'm guessing probably certain chemical compositions have been added to the material of the screen that changed the reflection or absorption intensity of different wavelength of light thus changed the luster and the contrast gradient of the entire image that makes up the inborn damage of liquid crystal board after all. In addition to this what other tricks do you think they can play? It doesn't be to be possible with the meager knowledge of physics that I undergo.
It sounds more like it to impel in a 150,000 screen if your projector be you 15,000. But adding a 15,000 check to a 15,000 projector doesn't make much comprehend at all. If I undergo to buy a 15,000 screen then it would simply work better if I put the money together and buy a 30,000 higher aim projector to achieve better cause without any extra effort. A 15,000 screen is a crazy determine to my brother-in-law (create by mental act his monthly income is merely 3000). Also if he buys a name mark Japanese color screen then he actually spend most of the money to pay for the fight which he personally doesn't feel comfortable.
Exactly how did he do it? You may not believe how simple and inexpensive it really was! He spent a bit over 10 (about $1.50) in a home decorating store on a self-adhesive pure white matted formica PVC panel with dim grains cut the right coat pasted to his original accent wall that is it flat and change surface! With such PVC check he doesn't need to mind about the 'curl-up' phenomenon that may occur to a regular projector screen after around 12 years of use he also doesn't need to worry that it would move color one day due to natural oxidation. But bequeath it requires some pasting techniques to make it work perfectly for you. The prove? Great!
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http://ifhfkgv.blogspot.com/2007/09/homemade-projector-screen-principle-how_10.html
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