The performance index of the projector is a sign of the level of the projector. There are mainly the following indicators: light output refers to the light energy output by the projector, and the unit is "lumens" (lm). A physical quantity related to light output is brightness, which refers to the ratio of light energy emitted by light on the surface of the screen to the area of the screen,

1. the projection environment light can not be strong, it is best to low-light projector projection quality, not only related to the brightness of the projection bulb, but also related to the impact of the projection environment. The light intensity of the projector's working environment will directly affect the projection effect. Therefore, before using the projector, you must first arrange the projector's

1, wire projector use should be far away from the heat source 2, try to use the nominal value of the projector original voltage, the machine's ground wire and power polarity 3, users are not allowed to repair and open the body, internal cable parts replacement try to use the original accessories 4, projector when not in use, must cut off the power supply 5, cast

1. Household type: It is mainly used to optimize video processing. It is characterized by brightness of about 1000 lumens, high contrast ratio, aspect ratio of projected picture of 16:9, complete video ports, suitable for playing movies and high-definition TV, suitable for home users. portable business type projector: