The school video projector is an excellent way to capture the attention of children and students. It can become a key element of class. Photocopies will regain their colors. The details of the images and documents on an area of a few square meters will be appreciated as much as possible, the students will extract video projects to work on. But which video projector to choose? We offer you all the keys to make the most suitable option.
Equipping the classroom with a video projector is one thing and using it is another. It should be noted that between the two stages, there are some other important steps to follow. There are many applications, references and models to consider from the very beginning. So, let's see some tips for buying and installing a video projector.
Fixed to the ceiling or not?
Mounted on the ceiling, the projector is always ready to use. The device can be even more interesting, especially for students, if it is paired with an interactive screen.
If the projector is not fixed, this allows a lesson to be played with it anywhere, as long as there is a suitable projection surface and power supply.
The front projection involves placing the projector on a table in front of the screen. This is the most common way to install, because it is quick and easy to follow. Some models, such as pico projectors, are very suitable for front installation.
Rear projection is done by installing the projector on the floor or ceiling behind the screen. This type of installation requires a special projection screen.
The distance between the projector lens and the screen, the zoom setting, and the video format each affect the size of the projected image. Refer to the specific instructions in the user manual to determine the proper positioning for the projector.
The larger the class, the larger the display area must be, so that all students can see all the details of the image correctly. However, the larger the projection surface, the higher the brightness of the lamp. This parameter can be checked in advance with the help of a 3D camera simulator.
Standard projector lamps become very hot and must be cooled by built-in fans. If the sound of a movie generally covers their operating noise, when playing images without sound, or if your explanations need to be heard very clearly, too loud ventilation can become annoying to some.
If you want a quiet model, you must refer to the sound level, indicated in decibels with a value generally between 25 and 35 dB. Most projectors also offer an "eco" mode (with a lower brightness) to reduce noise. Check the sound level emitted by the device. Beyond 35 dBa, the problems produced can become annoying and can disrupt your time.
A complementary approach is the option for a short focal length. Because the video projector is placed closer to the screen than the viewer, the noise will be less noticeable.
The type of projector chosen
The classic projector is the most economical solution to simply design the lesson plan and the lesson every hour. You can find equipment with sufficient features from 1000 lei.
If you need to change the classroom in which you teach regularly, a traditional nomadic video projector (ie lighter than 3 kg for a relatively small projection area) is a good option. But be careful not to disconnect it and move it immediately after use, otherwise it will be quickly damaged. You have to wait at least ten minutes for it to cool down, which means either closing your projection long enough before the bell rings, or waiting for the whole break.
Interactive video projectors (PVI) have a particularly relevant use in the classroom. Energize your courses, make them interactive, annotate your course materials and save them. Arranged above a board, it has the advantage of being safe and small in size. You can also stand and explain in front of the screen, without tiring your eyes or shading the image.
The pico projector can be a good idea. Even if the prices are generally affordable, the features are interesting, and the dimensions are really seductive, the brightness will not be enough. Indeed, a pico projector does not allow projection in broad daylight and even in the dark on surfaces as large as a conventional or interactive video projector.
This is the most important point. The image must remain legible even in a classroom with large windows in direct sunlight. Thus, an efficient video projector for a standard classroom must have a brightness higher than 2000 Lumens. If you have a small budget and you will have to make drastic choices in terms of specifications, it is better to favor good brightness at the expense of other features, such as resolution.
Almost all computers have a VGA output. Therefore, it is a type of plug that should not be ignored. Check that the devices you want to attach are compatible with the video projector, so that you do not unbalance the budget by purchasing expensive adapters.
Some even offer USB ports and / or an SD card reader. You will be able to project the desired content (images, movies, documents, etc.) without the need for a computer. Accepted features and formats are often limited, but all in all, these opportunities can be very practical.
Fixed or mobile, the projection screens ( here models listed by us as examples ) are essential elements of a video installation. There are different types and formats.
Rolling screen: can be fixed on the wall or ceiling. The screen scrolls (manually or automatically) on request. It is a good choice, provided that the nazdravanii stay away from the drive system.
The screen on the floor (pull-up): the principle is the same, but the screen support is placed on the ground and the canvas rolls up. No special mounting operation is required.
Tripod screen: is an agreed solution for a mobile screen or a small space.
The fixed screen remains the best solution, because the canvas will stay stretched and will not deform. Instead, the screen is always visible and can be easily confused with a whiteboard. It will not be funny at all that, no matter what you design, you always see on the screen a mathematical formula or an email address.
You can also use a white or gray wall, but with a very uneven result, depending on the type of surface.