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Added for You - Homemade Projector Screen - The Principle & How to DIY
The weather is one of the most beloved features of the Caribbean Islands. You can expect to have the perfect weather here almost the year around. The best way to enjoy the Caribbean?s lovely weather is to travel with a Caribbean Cruise Line. Yes, you can always take a plane to the Caribbean if you are in a hurry. That is the quickest and probably the cheapest way to reach your island destination.If you want to combine transportation with leisure views of the islands from the ocean a Caribbean cruise is best. There is no better way to enjoy an island paradise than from the deck of a luxury cruise line ship. It also great to unpack once and still reach many destinations. About two million persons take a Caribbean cruise line each year to enjoy the
The ideal screen for the DLP projector that my brother-in-law purchased should be like a white wall, just let the project light reflected completely without any "reservation". He figured that he really didn't need such costly screen. So he finally decided to make one on his own.
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 de
The New York Times has developed over five decades a great brand name and recently they have thrown it all away due to scandals such as plagiarism, made up stories and giving away National Secrets effectively helping our enemies. Some say the New York Times has sunken to an all time low and compare it to used toilet paper. They have even said that the newspaper is not worth the paper it is written on?But the New York Times makes good firewood logs for my automatic newspaper rolling machine? Liberal trash I tell you. I hope you do not actually read that paper? It does come in handy in the recycled newspaper trays at Starbucks to wipe up some sniveling little punk kid's Frappachino who got so excited from the sugar rush that he spilled it all over
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 distinguish the genuineness of an import screen, it is hard even for himself. Some of them that are labeled with 'import' or 'joint capital' were actually manufactured somewhere in the south of China. He felt that he'd rather to buy a ?300 domestically manufactured screen with good feelings than buy this kind of "import screen". What this friend said makes perfect sense. But after doing some research, my brother-in-law found that all screens on the local market are made from high gain Bolivian bead that is used for projecting newspaper clips, they are simply not suitable for video frequency.
Theoretically speaking, a white wall with one smooth side actually is the best "screen". Because its gain is 1, meaning that the light projected can be completely reflected out, which is an ideal state of being "no absorption, no gain". Unfortunately, for the purpose of absorbing and proliferating the sound wave, he already made the wall a background wall with sound-absorbing material and plywood installed. making it impossible to serve as a "projector screen', he had to find another solution.
You might be wondering at this point: why do people still bother purchasing expensive screens if we can all use white walls?
Well, there are always benefits and advantages of using a professional screen: convenient, artistically beautiful and dignified, good screen can also make up the insufficiency of a projector and improve visual effect. Among the expensive screens, one type is "gray screen" (cost about ?15,000, roughly $2000). This kind of screen probably was originally designed for liquid crystal projectors. The biggest problem with liquid crystal projector is that the color appears dark and grey, insufficiently calm. This is its "congenital defect" that is caused by its liquid crystal board and path of rays.
Regarding gray screen, we all know that gray is merely a lighter black, and black absorbs all visible light. Gray can only partially absorb visible light, it is like brightness of the picture is reduced. If you have used any picture processing software's "brightness / contrast gradient" option, you should certainly have noticed such phenomenon that reducing brightness is equivalent to increasing contrast gradient? Same concept, since the brightness has been reduced, it in turn increased its contrast gradient. The black effect gets improved due to the bigger contrast. We can also experience the same effect when we look out through the sunshade glass of our car. In fact, there are many ways to just reduce the brightness, you don't have to use gray screen. There are magazines recommending putting the light gray filter of a photographic camera to the projection lens, the principle is the same. You can even use more simpler method, namely you need to adjust the projector's output brightness or increase the contrast gradient. No need to spend a cent, you may achieve the similar effect, but the premise is that showroom must be dark enough.
Back to the bottom line, if a gray projector screen cost you $2000, definitely it is not just because the screen color is changed from white to gray. 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 flaw of liquid crystal board after all. In addition to this, what other tricks do you think they can play? It doesn't seem to be possible with the meager knowledge of physics that I have.
It sounds more like it to throw in a ?150,000 screen if your projector cost you ?15,000. But adding a ?15,000 screen to a ?15,000 projector doesn't make much sense at all. If I have to buy a ?15,000 screen, then it would simply work better if I put the money together and buy a ?30,000 higher level projector to achieve better effect without any extra effort. A ?15,000 screen is a crazy price to my brother-in-law (imagine his monthly income is merely ?3000). Also if he buys a name brand Japanese gray screen, then he actually spend most of the money to pay for the labor which he personally doesn't feel comfortable.
The ideal screen for the DLP projector that my brother-in-law purchased should be like a white wall, just let the project light reflected completely without any "reservation". He figured that he really didn't need such costly screen. So he finally decided to make one on his own.
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 de
Till recently, it was not possible to get a debt consolidation loan with bad credit. Lenders use to turn down bad credit applicants for this kind of loans. But nowadays, and due to a highly competitive loan market, bad credit debt consolidation loans have become widely available. With a Bad credit debt consolidation loan, you won’t be let down again. There are many companies, at present, who specialize in helping people regardless of their credit. Bad Credit Debt Consolidation Has Become Very PopularFor hundreds of thousands of Americans, who every week recognize that their credit situation is less than pleasing, Bad credit debt consolidation is the solution to their problems. Getting into financial can be the result of varied
Theoretically speaking, a white wall with one smooth side actually is the best "screen". Because its gain is 1, meaning that the light projected can be completely reflected out, which is an ideal state of being "no absorption, no gain". Unfortunately, for the purpose of absorbing and proliferating the sound wave, he already made the wall a background wall with sound-absorbing material and plywood installed. making it impossible to serve as a "projector screen', he had to find another solution.
You might be wondering at this point: why do people still bother purchasing expensive screens if we can all use white walls?
Well, there are always benefits and advantages of using a professional screen: convenient, artistically beautiful and dignified, good screen can also make up the insufficiency of a projector and improve visual effect. Among the expensive screens, one type is "gray screen" (cost about ?15,000, roughly $2000). This kind of screen probably was originally designed for liquid crystal projectors. The biggest problem with liquid crystal projector is that the color appears dark and grey, insufficiently calm. This is its "congenital defect" that is caused by its liquid crystal board and path of rays.
Regarding gray screen, we all know that gray is merely a lighter black, and black absorbs all visible light. Gray can only partially absorb visible light, it is like brightness of the picture is reduced. If you have used any picture processing software's "brightness / contrast gradient" option, you should certainly have noticed such phenomenon that reducing brightness is equivalent to increasing contrast gradient? Same concept, since the brightness has been reduced, it in turn increased its contrast gradient. The black effect gets improved due to the bigger contrast. We can also experience the same effect when we look out through the sunshade glass of our car. In fact, there are many ways to just reduce the brightness, you don't have to use gray screen. There are magazines recommending putting the light gray filter of a photographic camera to the projection lens, the principle is the same. You can even use more simpler method, namely you need to adjust the projector's output brightness or increase the contrast gradient. No need to spend a cent, you may achieve the similar effect, but the premise is that showroom must be dark enough.
Back to the bottom line, if a gray projector screen cost you $2000, definitely it is not just because the screen color is changed from white to gray. 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 flaw of liquid crystal board after all. In addition to this, what other tricks do you think they can play? It doesn't seem to be possible with the meager knowledge of physics that I have.
It sounds more like it to throw in a ?150,000 screen if your projector cost you ?15,000. But adding a ?15,000 screen to a ?15,000 projector doesn't make much sense at all. If I have to buy a ?15,000 screen, then it would simply work better if I put the money together and buy a ?30,000 higher level projector to achieve better effect without any extra effort. A ?15,000 screen is a crazy price to my brother-in-law (imagine his monthly income is merely ?3000). Also if he buys a name brand Japanese gray screen, then he actually spend most of the money to pay for the labor which he personally doesn't feel comfortable.
The ideal screen for the DLP projector that my brother-in-law purchased should be like a white wall, just let the project light reflected completely without any "reservation". He figured that he really didn't need such costly screen. So he finally decided to make one on his own.
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 de
One of the biggest hurdles to travel in space will be preventing space radiation from killing our astronauts. Long-term space flight may be impossible because it might take many generations. If so, the space radiation will prevent the reproductive functions on the human body from working and therefore the spaceflight can not be longer than one human generation.Worse off is that human life expectancy will be cut short due to the space radiation unless special care is taken to protect the space travelers otherwise we have to send robots instead of people. Either way due to space radiation, this will mean new materials and specially designed spacecraft will be needed at minimum.Here is a thought I have been toying around with. Let's use Ca
Regarding gray screen, we all know that gray is merely a lighter black, and black absorbs all visible light. Gray can only partially absorb visible light, it is like brightness of the picture is reduced. If you have used any picture processing software's "brightness / contrast gradient" option, you should certainly have noticed such phenomenon that reducing brightness is equivalent to increasing contrast gradient? Same concept, since the brightness has been reduced, it in turn increased its contrast gradient. The black effect gets improved due to the bigger contrast. We can also experience the same effect when we look out through the sunshade glass of our car. In fact, there are many ways to just reduce the brightness, you don't have to use gray screen. There are magazines recommending putting the light gray filter of a photographic camera to the projection lens, the principle is the same. You can even use more simpler method, namely you need to adjust the projector's output brightness or increase the contrast gradient. No need to spend a cent, you may achieve the similar effect, but the premise is that showroom must be dark enough.
Back to the bottom line, if a gray projector screen cost you $2000, definitely it is not just because the screen color is changed from white to gray. 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 flaw of liquid crystal board after all. In addition to this, what other tricks do you think they can play? It doesn't seem to be possible with the meager knowledge of physics that I have.
It sounds more like it to throw in a ?150,000 screen if your projector cost you ?15,000. But adding a ?15,000 screen to a ?15,000 projector doesn't make much sense at all. If I have to buy a ?15,000 screen, then it would simply work better if I put the money together and buy a ?30,000 higher level projector to achieve better effect without any extra effort. A ?15,000 screen is a crazy price to my brother-in-law (imagine his monthly income is merely ?3000). Also if he buys a name brand Japanese gray screen, then he actually spend most of the money to pay for the labor which he personally doesn't feel comfortable.
The ideal screen for the DLP projector that my brother-in-law purchased should be like a white wall, just let the project light reflected completely without any "reservation". He figured that he really didn't need such costly screen. So he finally decided to make one on his own.
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 de
Your home more than likely is your largest asset. Title Insurance protects you against future claims that someone may have on your property. There can be a number of people and agencies that very well could file a claim on your property.The title policy is part of your closing documents package. It should be on top of the stack to be easily accessible if a situation in the future comes up. Some of those who may have an interest in your property could be government agencies, contractors, lenders and even the seller’s relatives and heirs. The title company may have done its best, but as time goes on the property’s history becomes more complex.The title company, during the loan process, does a search of all records available that concern the
Back to the bottom line, if a gray projector screen cost you $2000, definitely it is not just because the screen color is changed from white to gray. 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 flaw of liquid crystal board after all. In addition to this, what other tricks do you think they can play? It doesn't seem to be possible with the meager knowledge of physics that I have.
It sounds more like it to throw in a ?150,000 screen if your projector cost you ?15,000. But adding a ?15,000 screen to a ?15,000 projector doesn't make much sense at all. If I have to buy a ?15,000 screen, then it would simply work better if I put the money together and buy a ?30,000 higher level projector to achieve better effect without any extra effort. A ?15,000 screen is a crazy price to my brother-in-law (imagine his monthly income is merely ?3000). Also if he buys a name brand Japanese gray screen, then he actually spend most of the money to pay for the labor which he personally doesn't feel comfortable.
The ideal screen for the DLP projector that my brother-in-law purchased should be like a white wall, just let the project light reflected completely without any "reservation". He figured that he really didn't need such costly screen. So he finally decided to make one on his own.
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 de
PlanningWatching a movie in your own home theater is a great way to escape reality without leaving the house. But before forging ahead with a home theater construction project, you’ll need to put serious time into planning the system. The biggest decision will be what room to put your home theater in. Next comes the selection of video and audio components, as well as the accessories that bring everything together. And then there’s the issue of cost: Setting a realistic budget for the project and sticking to it will save you plenty of headaches in the long run.Another decision to make when planning a home theater is whether to personally install the equipment or hire professionals to handle the project. If you’re a tech-savvy DIY type, the
The ideal screen for the DLP projector that my brother-in-law purchased should be like a white wall, just let the project light reflected completely without any "reservation". He figured that he really didn't need such costly screen. So he finally decided to make one on his own.
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 size, pasted to his original background wall, that is it, flat and smooth! With such PVC screen, he doesn't need to worry 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 turn yellow one day due to natural oxidation. But remember it requires some pasting techniques to make it work perfectly for you. The result? Great!
Here are couple of self-made projector screen photos from my brother-in-law as 'evidence':
www.news-blogs.com/_images/entertainment/diy_screen.jpg
www.news-blogs.com/_images/entertainment/diy_screen2.jpg
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