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:

1, to clear the nature of the source to be displayed according to the nature of the source, the projector can be divided into ordinary video machine, digital machine 2 categories. When only full TV signals are displayed, such as karaoke halls playing video tapes, ordinary video machines can be selected. To display the signal output by VGA card, digital machine can be selected. And NEC

In recent years, the off-line demonstration function, which is more popular in the business projector market, is gradually being diluted and replaced by the wireless connection function. Because after the projector has added a wireless connection, it not only improves work efficiency during the demonstration process, but also makes the entire demonstration process without any complicated settings, making it more convenient to use. According to the PMA

In recent years, the domestic projector market has developed rapidly, and household mini-projectors have received more and more consumer attention. Coupled with the maturity of micro-projection technology, it has gradually contributed to the entry of micro-projectors into the home market. According to statistics, mini-projectors in January 2013, the domestic projector market mini-projection agency