This is because standard white front projection screens reflect ambient light, as well as projected light so, in areas with normal or high ambient light levels, image contrast levels (image quality) will be poor. Using a more powerful projector to try to improve the image quality in these conditions is ineffective and a waste of money. AppNexus sets the anj cookie that contains data stating whether a cookie ID is synced with partners. The screens in this review measured the following vertical half gain angles under the ambient light conditions used for the Contrast Test 1:

Whilst a 2500 ANSI lumen projector may not be the first choice for an outdoor projector, the CHiQ A5U is worth considering due to its separate high powered speakers and highly understated lumens. The A5U has the equivalent brightness of some other manufacturers whose stated advertised lumens are 4,000 - 5,500 ansi lumens so don't be put off by the low advertised ansi lumens. Ambient light has a hugely negative impact on the image quality of standard front projected displays, causing images to appear weak and washed out. The S PRO series uses special ALR fabric to optimise the projected image from UST projectors. This ALR fabric can efficiently reject 97% of ambient light to negate the washout effect from other light in the room.In our view, the EPV PolarStar is an excellent choice if you need a polarized ALR screen to support a passive 3D system. But passive 3D support is its sole competitive advantage. If you are not going to use this feature, the PolarStar is still a very good all around ALR screen with a cleaner, more artifact free picture than most of the other screens in this group. But it can be outperformed in contrast by some competitors and in viewing angles by others, each of which have their own set of limitations. So the trade-offs need to be carefully evaluated to determine which products would be the best fit for any given viewing environment. The most problematic aspect of the MS1000X's performance was a very noticeable texture in the image, looking like ever-present fine grain. It is visible even when the camera is not panning, but becomes particularly obvious when it pans over non-textured subjects. Of the screens in this review the MS1000X stands alone as having the most noticeable texture artifacts. Short-throw projectors, and more specifically UST projectors, yield certain advantages over traditional long throw projectors. First, and most obviously, there’s the space-saving factor. Because ultra-throw throw projectors require a few inches of space between the unit and the screen to shoot a 100-inch or larger image, UST projectors are great solutions for having a home theatre in a small space. Create the perfect, discreet home cinema setup, up to 120”, with a Vividstorm S Pro Electric Floor Rising Screen. A unique ambient light rejecting (ALR) screen designed exclusively for UST projectors. ( Non-UST floor rising screens available here)

See full range of outdoor projectors here: https://personalprojector.co.uk/collections/summer-of-sport-1 The Slate's vertical half angle of 26 degrees was better than most, allowing a bit more latitude in the vertical placement of the projector vis a vis the audience.

Portable projectors offer portability, wireless connectivity, LED light source, android and built in battery whereas lamp based projectors generally speaking only offer high brightness, without all these other features, and are mains powered so an extension cable may be needed. With a nearly perfect viewing cone of 170 degrees, the UST ALR material is capable of being viewed from extreme off-axis positions. Even if you have watched the screen for a long time, your eyes will not feel tired. With the Vividstorm screen contained in a screen casing, there is no need for any installation, simply place the screen in your desired area and plug it in. You can also easily change the position of the screen in your room – perfect if you get a new sofa or decide to re-arrange your room. But dvLED is not generally suitable for Microsoft Teams Rooms, teaching spaces etc. They are too bright and unsuitable for sustained viewing. Although the brightness can be reduced, this comes at a cost of reduction in dynamic range.