- Data projectors are generally used in areas for which the price of a monitor of a required size would be inacceptable. A typical width of a projected image is 1.5 meters and more. If the projector is sufficiently powerful and no significant disturbing lighting is present, the image size can be up to 20 m.
Basic types of projectors:
- Data projectors can be divided by weight and mobility to ultralight (up to 2 kg), personal (up to 4 kg), mobile (up to 6 kg) and conference types (over 6 kg). Another important parameter is the projector power evaluated in ANSI lumens. This determines the maximum amount of light emitted through the objective to the projection surface. Based on this, image size can be determined while preserving a sufficient quality.
- Common projectors for smaller and medium rooms and classrooms achieve approximately 3,000 ANSI lumens. In larger and medium sized areas for 30 to 100 spectators, a power of 3,000 to 10,000 ANSI lumens should be provided, while for still larger areas for 100 and more people a data projector exceeding 10,000 ANSI lumens should be used.
- The second key factor is the projector resolution. Common projectors provide a resolution of 1024 x 768 for a 4:3 format, higher quality ones 16:10 or 16:9 with a resolution of 1280 x 800 to 1920 x 1200. Data projectors can also be classified according to their projection ratio (between projection distance and image width). Available are projectors with an ultrashort projection distance (projection ratio 0.2 to 0.4:1), short projection distance (0.4 to 0.7:1) and common projectors with a projection ratio approximately 1.2 to 3:1. Projectors intended for conferences usually have removable objectives and can be placed either very close to the projection surface or, on the contrary, extremely far from it – for instance into a projection booth at the other end of the hall.
AV MEDIA recommends projectors from NEC, Panasonic, Epson, Optoma, Christie:
CURRENT PRICES OF SCHOOL PRODUCTS:
RELATED PRODUCT GROUPS:
I am interested in this product