Ambient Light Rejecting (ALR) Projector Screens have a unique dual-purpose fabric. The screen material has a sawtooth angular design with a light rejecting filter. This has the combined effect of completely diffusing ambient light from above, whilst simultaneously reflecting a stunning image in the eyes of the viewer from an ‘Ultra Short Throw (UST)’ laser projector below.
This optical serrated structure of the screen allows the projected image from below, directly onto
a special light plate accurately reflecting the image to the viewer in a 170-degree cone. This optical serrated structure further has a light suppression filter that does not reflect light, it diffuses it such that the usual foggy phenomenon with traditional screens no longer occurs.
ALR fabrics are engineered to furnish directional acceptance and re-reflectance of light within defined limits. The goal of an ALR surface is to respond well to light from orthogonal or perpendicular sources, like the light from a projector and to limit the re-reflection of light coming from off-axis sources such as lighting and windows.
4K UST laser projectors have been around for a while now but it’s only recently that they have started to become more widely accepted by the market. The reason for this is four-fold: -
ALPD 3.0 laser light technology has achieved breakthroughs on colour accuracy and colour gamut and helped improve lightweight design and reliability for high-performance projectors. Light source efficiency has been increased by 20%, which realizes the 100% colour brightness of the single-chip UST DLP projectors and makes the colour accuracy reach the DCI colour gamut standard.
ALDP 3.0 laser light technology has enabled Projector Manufacturers to significantly reduce costs by providing the capability of producing stunning images from a single chip DLP.
Ahead of colour, brightness, and light source lifetime, the most important advantage of ALPD 3.0 is eye protection which is also a core value concerned by users. Compared with liquid crystal display technology which causes irreversible damage to the human eye, an Ultra Short Throw projector with ALPD 3.0 laser technology can provide effective protection for our eyes against radiation and fatigue due to lower blue light energy and strobe frequency. Moreover, it employs reflective imaging, which can avoid the light projecting directly to the human eye.