Projector screens are generally divided into two types according to their capacity: reflections on the screen and projection screen projector transmission. It also can be divided into soft and hard screen base on the materials they are made.

Home theater generally uses soft reflection screen. My brother-sister originally wanted to buy a  ¥ 1,000 (~ $ 150) so-called "import screen", but a friend of his who sells projector screens will said it is hard nowadays (in China) to distinguish the authenticity import screen, it is difficult even to himself. Some of them are marked "importation" or "Common capital 'were actually manufactured somewhere in southern China. I felt that prefers to buy at 300 ¥ A screen National Manufactured with a good feeling of buying this type of display "import". What this friend said makes sense. But after doing some investigation, my beautiful law found that all the screens in the local market are made of high profit drop of Bolivia, which is used for the selection of newspaper clips, simply not suitable for video frequency.

In theory, a white wall with a smooth face is actually the best "Screen". Because their gain is 1, meaning that the projected light can be completely reflected out, which is an ideal state of being "no absorption, no gain." Unfortunately, in order to absorb and propagation of sound waves, which it has in the wall of a bottom wall with absorbent material and plywood installed. making it impossible use screen "projector" I had to find another solution.

You may be wondering at this point: why do people still worth buying expensive screens if we can all use white walls?

Well, there's always the advantages and benefits of using a professional screen: convenient, artistically beautiful and dignified, good screen can also cause a lack of projector and improve the visual effect. Among the expensive screens, is a type of "screen gray "(on a cost of ¥ 15,000, about $ 2,000). This kind of screen probably was originally designed for LCD projectors. The biggest problem with the LCD projector is that the color is black and gray, quiet, not enough. This is his "birth defect", which is caused by his counsel LCD and path of the rays.

On the gray screen, we all know that Gray is not just a lighter black, and black absorbs all visible light. Gray can only partially absorb visible light is like the image brightness is reduced. If you use a word processor "The image brightness / contrast gradient" option, of course, you have noticed the phenomenon that the brightness of the reduction is equivalent to increasing contrast gradient? Same concept as the brightness was reduced, in turn increased its gradient contrast. The black effect is improved with higher contrast. You may also experience the same effect when looking through the glass hood of our car. In fact, There are many ways to simply reduce the brightness, you should not use the gray screen. There are magazines recommending putting gray filter of a camera to the projection lens, the principle is the same. You can even use the simplest method, namely, it is necessary to adjust the brightness of the projector output or increasing the contrast gradient. No need to spend not a penny, you can realize the similar effect, but the principle is that the showroom must be dark enough.

Go to the baseline, if a gray projector screen will cost $ 2,000, definitely not, because the screen color changes from white to gray. Speaking of optical principle, I fear that many more behind. I guess probably certain chemical compositions have been added to the material of the screen that has changed the reflection or intensity absorption of different wavelengths of light, which changed the brightness and contrast throughout the image gradient, which is the innate vulnerability of the board liquid crystal, after all. Besides, what other tricks do you think you can play? It seems impossible with the limited knowledge of physics I have.

It's more like throwing a  ¥ 150,000 when the projector screen will cost ¥ 15,000. But by adding a screen  ¥  ¥ 15,000 15,000 projector does not make much sense at all. If I have to buy a ¥ 15,000 screen, then simply work better if I put the money together and buy a ¥ 30,000 upper-level projector to achieve better effect without extra effort. AA ¥ 15,000 screen is a crazy price to my brother-in-law (imagine his monthly income is only  ¥ 3000). So if you buy a gray screen of the Japanese, then spent much of the money to pay for labor that does not feel personally comfortable.

The ideal screen for the DLP projector that my brother bought the right to be at a white wall, and if only given the project reflects completely unreserved. "He figured he did not really need expensive as a display. Finally, he decided to make one yourself.

Exactly how he did? You can not believe how simple and inexpensive item that was! He spent a little over ¥ 10 (about $ 1.50) Home Decor store label on a pure white matte Formica panel PVC with great sun, cut to size, glued to the back wall, which is flat and smooth! With a screen as PVC, need not worry about the "curl" phenomenon in May that occurs on a regular projection screen after about 12 years of use but also do not have to worry that in turn, a yellow day, due to natural oxidation. But remember it requires certain techniques of collage to work perfectly for you. The result? Great!

Here are even self-made photos of the projection screen of my brother, sister, as "evidence":

http://www.news-blogs.com/_images/entertainment/diy_screen.jpg

target = "_new" rel = "nofollow" href = "http://www.news-blogs.com/_images/entertainment/diy_screen2.jpg"> http://www.news-blogs.com/_images/entertainment/ diy_screen2.jpg

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Jacklyn Chen- Webmaster of news blogs and a full time mom who works very hard to make living with multiple web sites. For more information and articles about home theater, visit the Home Theater Blog, or check out the Entertainment Blog for more entertainment related information.

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