1. Clarify the nature of the signal source to be displayed: what is its line frequency and what display card is it outputting. According to the nature of the displayed source, projectors can be divided into two categories: ordinary video machines and digital machines. When only displaying the full TV signal, such as playing a video tape in a karaoke hall, you can choose an ordinary video machine; if you want to display the signal output by a VGA card, you can choose a digital machine.
2. Confirm the installation method: the projector installation methods are divided into table type front projection, ceiling front projection, table type rear projection, and ceiling rear projection. The front projection is that the projector and the audience are on one side; the rear projection is that the projector and the audience are on both ends of the screen. If you use it temporarily, you can choose a table-type ceiling. If the space is large, there are overall arrangements during the civil construction, and the overall effect of choosing the rear projection method is the best. If the space is small, you can choose the method of rear projection refraction.
3. Understand the display environment, such as indoor area size and lighting conditions: If the indoor area is less than 100 square meters, the display area is moderate, there is no sunlight, and the lighting is dark, you can choose a projector with a brightness of about 2000-3500 lumens. When the ambient light is bright, it is used in a relatively spacious place, and the display area is large, you need to choose a high-resolution, high-brightness projector, you can choose a high-brightness projector with 3000-6000 lumens.
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