Video projection systems consist of projectors and projection screens. Such systems are used to obtain a larger image at a lower cost, as well as are particularly relevant when a mobile solution is required.

When it comes to the choice of projectors, the resolution, the type of light source and the brightness of the projector are particularly important. The latter is one of the most relevant parameters of a projector. It determines how clearly the image will be displayed. A thing to consider is that it depends on the lighting in the room where the image is planned to be displayed.

An equally important issue is the type of light source that creates the luminous flux of a projector. The incandescent, laser and LED light sources are available. Lamp light sources have a shorter life than laser or LED, therefore, they are most commonly used in projectors of a lower power. At low power, their service life is up to 10-15 thousand hours. Nowadays, LED or LED and laser hybrid light sources are used as a replacement for incandescent light sources. This type of light source differs from incandescent in its service life, which can reach up to 30 thousand hours, while, the service life of laser light sources reaches 20 thousand hours and is one of the most popular solutions. Another important thing when choosing a projector is the resolution. The higher it is the more detailed projection of the image will be obtained. For example, while WXGA resolution is usually sufficient for a smaller projection, we recommend choosing WUXGA for a larger one.

The projector technology that forms the image should also be taken into consideration. There are 3 types of the imaging technology: 3LCD, 1DLP and 3DLP. 3LCD technology is the cheapest one but DLP technology produces brighter colours and higher contrast.

Another part of a projection system is projection screens. They can be foldable (manual or electric), fixed-frame (stationary) and portable, depending on the application. When choosing a screen, it is necessary to pay attention to the material of the screen. It can be a front projection or rear projection screen material or one that enables projection on both sides.

The reflection coefficient of the projection material is another important issue, as it will affect the image quality. To improve the contrast of the projection, a reflection coefficient of less than 1, for example, with the value of 0.8, is advisable, however, where a projector does not ensure a sufficient brightness, a coefficient should be higher, say, 1.8.

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