投影机选购时首先需要考虑的是它的亮度指标,通常用 ANSI 流明来表示。100人以下的一般会议室需要500ANSI 流明亮度的投影机。对于100人以上的会议室,由于空间较大,环境光线较强,则需要500以上甚至是1000ANSI 流明亮度的投影机。在这里需要引起注意的是投影机亮度的标法。Candela(坎德拉)是发光强度的基本单位。如果在给定的方向上,一光源发射出频率为540×1012Hz 的单色辐 Projector purchase first thing to consider is its brightness index, usually expressed in ANSI lumens. A general conference room of 100 people or less requires a 500 ANSI lumens projector. For meeting rooms of more than 100 people, due to the larger space, the strong ambient light, you need 500 or even 1000 ANSI lumens brightness projector. Here need to draw attention is the projector brightness standard. Candela (candela) is the basic unit of luminous intensity. If in a given direction, a light source emits monochromatic radiation at a frequency of 540 x 1012 Hz