Laser Projection & ALR Screen Technology

Laser Short-Throw Projector & ALR Screen Technology

Tradition projection, Commonly composed of signal equipment (PC, DVD, USB etc), Projector & Projection Screen & Hi-Fi equipment, signal equipment, Projector & Projection Screen determine the quality of the projection. At the same time, the intensity of ambient light is also a factor that cannot be ignored. Hi-Fi equipment is not our discussion content, in this article, we only discuss Laser Short-Throw Projector & ALR Screen Technology.
The projector is made up of Light Source, Optical Engine & Cameral Lens. On the market , According to Light Source&Lens Focal Length, Projector divides into: Laser Short-Throw Projector, Laser Projector, LED Projector, LCD Projector, DLP Projector. NO Special note, Generally refers to Medium and Long focal lens. For example, LCD Projector, DLP Projector.
Projection Screen is divided into ALR Screen, Electronic Screen, Frame Screen, Ultra Frame Screen, Quick Fold Screen etc.

Laser Short-Throw Projector

1.Light Source
At present, there are three main light sources used in projectors on the market: UHP Light Source, Laser Light Source & LED Light Source

* UHP Light Source is a traditional ultra-high voltage light source, which is gradually eliminated due to its short life (6000Hr) and fast light attenuation.
* Although the LED Light Source has a lifespan of more than 20,000 Hour and low cost, it is only used for Pico Projector with a projected screen size less than 100 inches due to its low Lumen (low projection screen brightness).
* The Laser Light Source has a wide color gamut, low attenuation, long life (20,000Hr), and high Lumen (above 3000ANSI). The disadvantage is that the current cost is relatively high. In order to distinguish other types of projector light source, it is called Laser.
2. The Lens
The traditional LCD Projector uses Medium and Long focal length lens, that is, we usually call it a telephoto projector. But Short-Throw Projector adopts an Ultra wide-angle lens, which we usually call Short-Throw Projector.
Through the above introduction, we understand the meaning of

Laser Short-Throw Projector:=Laser Light Source+Ultra wide-angle Lens

Advantages of Laser Short-Throw Projector
a. It is not limited by the viewing place, and it is easy to install and place
 Projection Distance and Projection Ratio are closely related. Projection Ratio refers to the ratio of Projection Distance to the width of the projection screen. The smaller the Projection Ratio value, the smaller the distance between the Projector and the projection screen. At present, the Projection Ratio of the Short-Throw Projector on the market can already be less than 0.2, that is, the projection of a 135-inch screen, and the distance between the Projector and the screen is less than 0.5m, thus effectively avoiding The danger of direct exposure to human eyes caused by the occlusion of the screen and the projection of strong light by personnel. The Projection Distance of a normal Projector is about 3.8m.
b. Lay a solid foundation for laser TV to go to market
Because Laser Short-Throw Projector has high brightness (greater than 3500ANSI), high-color gamut (85%), high-definition (4K), low attenuation-long life (20,000Hr) and other good performance, thus ensuring its output stable, high-contrast, high-saturation and high-brightness, high-quality pictures (the picture quality is very close to TV picture quality), and at the same time, the brightness can reach more than 3500ANSI lumens, creating favorable conditions for viewing movies in bright light environments, and for the trend of laser TV. The market has laid a solid foundation.

About LASER TV
LASER TV is actually one of the projection methods, LASER TV=Laser Short-Throw Projector +ALR SCREEN with LASER TV conditions:
a. Meet the requirements for viewing movies in a bright environment
b. Larger picture sizes than TV, with the same or similar picture quality as the TV
c. Easy to carry, install and use

Although Laser Short-Throw Projector already has the ability to output high quality picture quality, But become LASER TV, Need match better projection picture carrier--projection screen, So call LASER TV.

What are the specific requirements of the Laser Short-Throw Projector for the match screen:
a. To meet the requirements of watching movies in a bright environment, Ambient light illumination 250Lx or more
b. The screen size is larger than that of the TV (above 120 inches), and the flatness of the screen is at or close to the flatness of the TV screen (if the flatness does not meet the requirements, there will be obvious distortion on the screen, causing the screen to be blurred, which will affect the viewing of the movie. experience).
c. It is easy to carry, install and use, and the appearance and structure of SCREEN are diversified
At present, the only projection screen that can meet the above three conditions is ALR SCREEN.

ALR SCREEN

At present, there are mainly three types of ALR SCREEN in the market:
1) Fresnel
2) Black-matrix

3) SCRENPRO T-Prism

These are all practical applications of Fresnel technology. Fresnel ALR SCREEN is standard Fresnel structure, that is, arc-shaped structure, its manufacturing process is relatively complex, T-Prism & Black-matrix effect ALR SCREEN are all liner Fresnel structure, the three ALR technologies are to reflect ambient light and projected light in different Reflection and absorption is carried out on the surface, and different coating technologies are used to coat the high-performance multi-layer reflective material on the projection light reflection surface, so as to achieve the best anti-light and projection effect.

The differences between the three ALR technologies are:

Fresnel ALR SCREEN

The anti-side light ability is better than the latter two, and the brightness in the central area is higher than the latter two. The disadvantage is that the field of view is small (100), and the curling performance is not good. At present, it can only reach 120 inches. The product structure is single, only can Do hard screen; handling is inconvenient, logistics and transportation costs are high;

Projector installation method: ceiling mount.
Black-matrix ALR SCREEN has better anti-top light ability than the other two, a large field of view (172), and better curling performance than Fresnel ALR SCREEN. Hard screen, Ultra frame screen, and some electric products;

Projector installation method: dropdown.

SCREENPRO T-Prism ALR SCREEN

has a large field of view (172), and its curling performance is better than the previous two. It can reach 150 inches. The product appearance and structure are not limited. It can not only produce hard screen, Ultra frame screen, but also 150-inch ALR. Electronic screen, ALR electric floor lift, ALR ceiling hidden, can be used in a variety of places; more friendly to the projector: can be suspended and cast down. The disadvantage is that the ability to prevent side light and top light is slightly weaker than the first two.