FAQ

How to maintain projection screens?
When finish using it ,remember to check if there is any dust or diirty on the surface of the screen .If there is ,pls clean it with soft clothing and roll the screen to the matellic housing .When you don't use it ,pls make sure the screen rolled into the matalic cover.

If I want to choose a screen for home theatre ,which type is the best?
 It depends on the environment and the condition of the projector .We hereby suggest the white video Fabric .White video Fabric was formed by soft PVC which with diamond veins on it .The feature are delicate texture,smooth ,flat ,and flexible surface which can remove cockles ,fully reverts the image color as well as high contrast ratio. But if your projector is not with a hige contrast ,it will be better for you to choose Gray Video Spectra.By lowering the black levels of the projected video image,this surface creates a more film-like image and is a good choice white video is the main source of projected information.

.Can we choose the normal screen for the 3D theatre or something different ?
A: Normally speaking ,the common projector can be applicable to several kinds of the screens . While for the Screen of 3D theatre ,it depends on the projector .If you have the 3D projector ,then normal screen are suitable. But if you project it with two projectors overlapped , the screen with a high gain is a must , we suggest 3D screen facric and plain metallic screen .

What size opitons I have for stardard screen fromat?
Screen formats are determined by the specific aspect ratio of the screen. Aspect ratio is the fractional relation of the width of a video image compared to its height. The two most common aspect ratios in home video are 4:3 (also known as 4x3, 1.33:1, or standard) and 16:9 (16x9, 1.78:1, or wide-screen). All the older TVs and computer monitors you grew up with had the squarish 4:3 shape--only 33 percent wider than it was high. On the other hand, 16:9 is the native aspect ratio of most HDTV programming; it is 78 percent wider than it is tall, or fully one-third wider than 4:3. Another aspect ratios for education or business is 1:1,which is applicable of the manual screen ,tripod screen ,fast-fold screen and electric screen and so on .

How to select a screen best for me?
Today, the most commonly sold aspect ratios screens for home theaters are 1.78:1 (16:9) and now growing 2.35:1 (CinemaScope). 16:9 aspect ratio screens are a perfect match to today's HD video projectors. So we highly recommend the aspect ratio with 16:9 is a best choice . .Plus,If you want it for education use ,we advise the aspect ratio with 1:! of the screens ,such as manual screen , tripod screen ,fast-fold screen and electric screen and so on .

What is gain and why is it important?
Gain is the concept of a relative ratio of brightness between a sample and a standard. The Gain of 2 would be twice as bright as the standard. Since the light is reflecting back to the audience in a front projection screen, the higher the gain is the closer one has to sit directly in front of the screen, whereas if you had a lower gain screen you might be able to sit off axis as far as 40 to 60 degrees and still have a quality image.

What size screens do ALLY make?
We make size from 50" up to 200" diagonal in 4:3,16:9,1:1

What's low gain and its advantage?
A low gain screen is Diffusive and the material has a gain of between 0.9 and 1.3. i.e. it reflects 90% to 130% more light than the standard white magnesium oxide board in exactly the same conditions. There are two advantage of low gain. One is giving a greater viewing angle - so no matter where you and your guests sit the picture will be equally bright & clear, perfect for most Home Theatre situations.
The other is giving colour neutral reproduction, so all of your movies look natural and life like.

What's high gain?
A high gain screens are either Reflective or Retro Reflective and the material might have a gain of 1.8 or even 2.2. i.e. it reflects 180% or even 220% more light than the standard white magnesium oxide board.

What is ALLY matte white fabric?
Adopt advanced processing technology, the fabric is made of super slim material which make the surface very even. Greater viewing angle of nearly 180º and soft light, make color neutral and natural. It's flat curtain and no bad smell and no distortion. Luminance index is larger than 2.

What is ALLY glass beaded fabric?
Adopt advanced processing technology, the fabric has a high gain and high brightness which makes a good vision effect in bright condition. It's flat curtain and no bad smell and no distortion.

What is ALLY matte grey fabric?
Adopt advanced processing technology, which improve image contrast. It absorbs the reflected light and have an impact on perceived contrast more so than the contrast capability of the projector in ambient light conditions. It's flat curtain and no bad smell and no distortion.