Projector Basics
 

Brightness: International Standard elements are ANSI lumens. Determination of the following:
1) the distance between projector and screen: 2.4 m; 2) screen is 60 inches;
3) projection screen with a metering pen measuring the brightness of 9 points;
4) Find the average of 9 points luminance is the ANSI lumens.
various brands of projectors Determination different because, though the same ANSI lumens, yet the actual brightness difference. At the same time as the diminution of light, the brightness of the projector is a gradual decline. There are too ISO criteria, merely it is not commonly accustom.
Color: Now,Mens Gucci Boots, almost entire of the projector aid 24-bit true color. Therefore,Gucci Shoes, to evaluate the cutback degree of the projector's color, not fair the color,Gucci Shoes UK, but also the compare.

contrast: the ratio of dark and white, that is,Womens Gucci Flats, the gradient from black to white level. The larger the ratio, from black to white gradient level the extra so the richer color extravaganza.
screen size: is cast out of the screen diagonal size. To put the size needed, to be placed on the projector and screen the appropriate distance.
projection distance: the projector is the distance between the lens and the screen.
uniformity: the middle of the screen cast refers to the sunshine of the surrounding sunshine ratio. Generally defined for 100% of the middle.
dome function: feature of the projector with the image upside down so that the projector hanging upside down aboard the roof projection.
projection function: on the behind of the projector through the rear projection screen. Generally have the function of the projector.

Horizontal scanning frequency: also known as line frequency. The projector has a horizontal scan frequency range. If the input signal from the computer horizontal scan frequencies further this range, the projector will not run (NO SIGNAL).
Vertical scanning frequency: also known as skeleton frequency. If the input signal from the computer out of this range,Gucci Wallet UK, the vertical scanning frequency, the projector will not run (NO SIGNAL). In the scope, the vertical scanning frequency of the computer set to tall merit, the projection achieve.

computer input interfaces: a computer display signal is input. Meeting chambers generally have 2 interfaces with the aircraft, which can connect two computers, portable models typically only 1 interface.

microprocessor output interface: is the computer display output marker. This interface can be chained through the monitor. If the projector does no have this interface, in mandate apt interlock the monitor, use the VGA splitter to achieve.

video signal: For the video signal can support three formats: NTSC, PAL, SECAM.

standard video inputs: a standard video input connector (RCA). Standard video signal is encoded in the output while the signal ziped output, even when the receiver to decipher. This will lose some signal.

S Video input: video input with S (S Video). S video signal does not require the encoding and decoding, so there is no signal loss, so S video signal quality than standard video signals.

audio input and output: with audio input and output interfaces. Can be the computer, VCR and other audio signal input in, through the built spokesmen. Audio output interface can also be connected amplifier, outer speakers.

Power: Power the smaller the amount of heat generated at the machine is small,Gucci Shoes Sale, so that a consecutive projection of time on the machine longer, and the protective effect of fluid crystal films. In order to use security, the projector is equipped with thermal conservation in general.