buy projector should pay attention to what matters?

1, to be clear to show the source of nature
According to the nature of the source displayed, the projector can be divided into two categories: ordinary video machine and digital machine. When only full TV signals are displayed, such as playing video tapes in karaoke halls, ordinary video machines can be selected. To display the signal output by VGA card, a digital machine can be selected. All NEC models have both video and digital input ports.

2. Confirm the installation method
The projector installation method is divided into table type front projection, ceiling front projection, table type rear projection, ceiling rear projection. The front projection is the projector and the audience on one side; the rear projection is the projector and the audience at both ends of the screen. If temporary use, you can choose table ceiling. If the space is large and the civil construction is arranged as a whole, the overall effect of the rear projection method is the best. If the space is small, the rear projection refraction method can be selected.

3, according to the display environment, such as room size, lighting situation
If the room area is small, optional LCD projector. When the display area is large, there is no sunlight, and the lighting is dim, you can choose a low brightness about 800-1200ANSI projector. When the ambient light requirements are not high, the display area is large, display high-resolution graphics signals, you can choose LCD projector.